CVE-2018-25007: Unauthorized client-side property update in UIDL request handler in Vaadin 10 and 11

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-23 · updated 2026-06-17
Weakness: CWE-754

Description

Missing check in UIDL request handler in com.vaadin:flow-server versions 1.0.0 through 1.0.5 (Vaadin 10.0.0 through 10.0.7, and 11.0.0 through 11.0.2) allows attacker to update element property values via crafted synchronization message.

Affected products

vaadin flow: from 1.0.0 before 1.0.6 — fixed in 1.0.6
Vaadin: from 10.0.0 before 10.0.8; from 11.0.0 before 11.0.3 — fixed in 10.0.8, 11.0.3

How to fix

Upgrade to a fixed version: vaadin flow 1.0.6; Vaadin 10.0.8, 11.0.3. Check the vendor advisory for mitigations.

References

https://github.com/vaadin/flow/pull/4774
https://vaadin.com/security/cve-2018-25007
https://github.com/vaadin/flow/pull/4774
https://vaadin.com/security/cve-2018-25007

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